问题
I've got a date in the following format:
2013-05-04T05:07:09+00:00
I'm using MagicalRecord to map the NSDate automatically. As far as I can see the above date format should comply with MagicalRecord's default date format: yyyy-MM-dd'T'HH:mm:ss'Z'.
I have tried with a custom dateFormat entry in the attribute's user info (see this article):
yyyy-MM-ddTHH:mm:ss+Z, yyyy-MM-dd T HH:mm:ss Z, yyyy-MM-dd'T'HH:mm:ss'+'Z
but none of them work in order to have it parse the date properly and it always returns nil regardless of setting a custom dateFormat or using MagicalRecord's default format.
回答1:
Let's look at your string:
2013-05-04T05:07:09+00:00
This is:
- four digit year
- hyphen
- zero-padded month
- hyphen
- zero-padded day of month
- 'T' character
- zero-padded hour
- ':' character
- zero-padded minute
- ':' character
- zero-padded second
- timezone (with direction from GMT and a separating colon)
Thus, according to the date format specifiers documentation, the pattern you'd want is:
yyyy-MM-dd'T'HH:mm:ssZZZZZ
Also, be sure to use the en_US_POSIX locale with the NSDateFormatter.
来源：https://stackoverflow.com/questions/16377316/magicalrecord-date-parsing